ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,768,447, issued on Oct. 20, was assigned to VALQUA LTD. (Tokyo).
"Annular seal material and manufacturing method" was invented by Naoki Osumi (Gojo, Japan) and Tomomitsu Mochizuki (Gojo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to an annular seal material comprising a core and an outer layer covering a periphery of the core, wherein the outer layer has a thick film portion and a non-thick film portion in a cross section in a circumferential direction. According to the present invention, provided are an annular seal material that is constituted of a core and an outer layer and that suppresses cracking in the oute...